My friend has
faced this
question! I
don't know
clearly. So
please anyone
give me the
correct and
short answer to
this question?
What is variable
frequency drive?
Types, what is
star to delta?
Why this
arrangement
necessary?
- 5 Answers
- 8149 Views
- Asian Paints, TCS, I also Faced
- E-Mail Answers
Answer Posted / vasu
VFD are used to make the motor to run in desired speed. By
variying the input supply frequency we can vary the speed of
the motor. some other types are VVFD - Variable voltage and
frequency drive, Vector drive.
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
Why is it necessary to use compensation leg to measure the liquid level in a closed or pressurized tank?
Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?
How to calculate P,I&D value in PID controller ?
how to rectify the poor signal strength in utrasonic digtial flow meter ,model:ge digital xce868i
pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.
3. Differentiate between ultrasonic flowmeter and radar type flow meter.
How to Calibrate Flammable gas detector in field
A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?
find the kp ki kd from the transper function G(S)=29.44s+04707/1.5349s2+s
What is difference between “Fault Tolerant” & “Fault avoidance” PLC? Application where these system s are used?
why we use impulse line of flow transmitter at 45 deg. angle both side of orifice plate.
centrifugal compressor interlock? Tell me the parameter at which compressor will trip
I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?
Capacitance, resistance ( colour coding ), parallel & series circuits.
we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.
